body {
      font-family: Arial, Helvetica, sans-serif;
      line-height: 1.6;
      margin: 0;
      padding: 0;
      background: #f9f9f9;
      color: #333;
    }
    .container {
      width: 90%;
      max-width: 1100px;
      margin: auto;
      padding: 20px;
      background: #fff;
    }
    h1, h2, h3 {
      color: #222;
    }
    h1 {
      font-size: 28px;
      margin-bottom: 15px;
    }
    h2 {
      font-size: 22px;
      margin-top: 30px;
      margin-bottom: 10px;
      border-left: 4px solid #0077cc;
      padding-left: 8px;
    }
    p {
      margin: 10px 0;
    }
    ul {
      margin: 10px 0 20px 20px;
    }
    .spec-table {
      width: 100%;
      border-collapse: collapse;
      margin: 20px 0;
    }
    .spec-table th, .spec-table td {
      border: 1px solid #ddd;
      padding: 8px 12px;
      text-align: left;
    }
    .spec-table th {
      background: #f0f0f0;
      width: 30%;
    }
    .highlight {
      background: #eef7ff;
      padding: 15px;
      border-left: 4px solid #0077cc;
      margin: 20px 0;
    }
    footer {
      margin-top: 40px;
      padding: 20px;
      background: #222;
      color: #ddd;
      text-align: center;
      font-size: 14px;
    }
    footer a {
      color: #fff;
      text-decoration: none;
    }